2010145_zh-CN

[#1]

[Yocto][mickledore-6.1.55][iMX8MN]Marvell MV88E63930 交换机设备树

Hi Forum,

我提出 Marvell MV88E63930 交换机是为了激发以下讨论： https://lore.kernel.org/all/[email protected]/

到目前为止，eth0 处于启动状态：

[ 2.147362] mdio_bus 30be0000.ethernet-1:00: Fixed dependency cycle(s) with /soc@0/bus@30800000/ethernet@30be0000/mdio/switch@0/vddio-regulator
[ 2.160971] fec 30be0000.ethernet eth0: registered PHC device 0
[ 6.601525] mv88e6085 30be0000.ethernet-1:00: <- addr: 0x00 reg: 0x03 val: 0xffff
[ 7.005821] fec 30be0000.ethernet eth0: Link is Up - 1Gbps/Full - flow control off
[ 7.005866] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready

但是，我无法与交换机 CPU 通信来对其进行配置：

[ 6.601525] mv88e6085 30be0000.ethernet-1:00: <- addr: 0x00 reg: 0x03 val: 0xffff

在我之前的问题中，尽管发生了内核崩溃，我仍然能够读取交换机中的某些寄存器： https://community.nxp.com/t5/i-MX-Processors/Yocto-mickledore-6-1-55-iMX8MN-Marvell-MV88E63930-drive...

您能帮忙验证我的设备树吗？

设备树和示意图在附件中。

提前感谢！

Khang

i.MX 8M | i.MX 8M Mini | i.MX 8M Nano回复：[Yocto][mickledore-6.1.55][iMX8MN]Marvell MV88E63930 交换机设备树

嗨@Zhiming_Liu ，

感谢您的支持，但您分享的链接是我之前测试过的，MDIO bitbang 是关于以软件方式使用通用 GPIO 作为 MDC/MDIO。

此外，我能够从硬件方面解决问题，因此我关闭了此票。

问候，
K.

回复：[Yocto][mickledore-6.1.55][iMX8MN]Marvell MV88E63930 交换机设备树

Hello,

我在i.MX8MQ平台上找到了关于marvell,mv88exxxxx的其他dts节点。此 dts 节点未注释 mdio 中的时钟频率和抑制前导码。

&fec1 {
	pinctrl-names = "default";
	pinctrl-0 = <&pinctrl_fec1>;

	phy-handle = <&phy0>;
	phy-mode = "rmii";
	status = "okay";

	mdio {
		#address-cells = <1>;
		#size-cells = <0>;
		clock-frequency = <12500000>;
		suppress-preamble;
		status = "okay";

		switch: switch@0 {
			compatible = "marvell,mv88e6085";
			pinctrl-0 = <&pinctrl_switch_irq>;
			pinctrl-names = "default";
			reg = <0>;
			dsa,member = <0 0>;
			eeprom-length = <512>;
			interrupt-parent = <&gpio1>;
			interrupts = <15 IRQ_TYPE_LEVEL_LOW>;
			interrupt-controller;
			#interrupt-cells = <2>;

			ports {
				#address-cells = <1>;
				#size-cells = <0>;

				port@0 {
					reg = <0>;
					label = "gigabit_proc";
					phy-handle = <&switchphy0>;
				};

				port@1 {
					reg = <1>;
					label = "netaux";
					phy-handle = <&switchphy1>;
				};

				port@2 {
					reg = <2>;
					phy-mode = "rev-rmii";
					ethernet = <&fec1>;

					fixed-link {
						speed = <100>;
						full-duplex;
					};
				};

				port@3 {
					reg = <3>;
					label = "netright";
					phy-handle = <&switchphy3>;
				};

				port@4 {
					reg = <4>;
					label = "netleft";
					phy-handle = <&switchphy4>;
				};
			};

			mdio {
				#address-cells = <1>;
				#size-cells = <0>;

				switchphy0: switchphy@0 {
					reg = <0>;
					interrupt-parent = <&switch>;
					interrupts = <0 IRQ_TYPE_LEVEL_HIGH>;
				};

				switchphy1: switchphy@1 {
					reg = <1>;
					interrupt-parent = <&switch>;
					interrupts = <1 IRQ_TYPE_LEVEL_HIGH>;
				};

				switchphy2: switchphy@2 {
					reg = <2>;
					interrupt-parent = <&switch>;
					interrupts = <2 IRQ_TYPE_LEVEL_HIGH>;
				};

				switchphy3: switchphy@3 {
					reg = <3>;
					interrupt-parent = <&switch>;
					interrupts =  IRQ_TYPE_LEVEL_HIGH>;
				};

				switchphy4: switchphy@4 {
					reg = <4>;
					interrupt-parent = <&switch>;
					interrupts = <4 IRQ_TYPE_LEVEL_HIGH>;
				};
			};
		};
	};
};

更重要的是，这个 dts : arch/arm64/boot/dts/freescale/imx8mq-zii-ultra.dtsi正在使用 MDIO bitbang，你可以尝试 MDIO bitbang

此致，
志明